Characterization of Surface and Bulk of Cattle Bone-oringinated Hydroxyapatite

Abstract

A cattel bone-originating hydroxyapatite (r-HAp) was found to have a more variety of basic sites than reagent-synthesized hydroxyapatite (s-HAp) from TPD spectra of CO₂. This was ascribed to the results that r-HAp had a Ca-deficient strucrure and contained Mg and Na and small amounts of other ions as impurities. r-HAp showed more uptake of Ca from a simulated body fluid (SBF) and more elution to SBF in the absence of Ca in SBF than s-HAp. These results indicated the possibility that r-HAp might be a promising biocompatible material due to easy substitution material for hard tissues around it in being implanted.